Uv sterilizers and chelated iron precipitation problem - Fertilizing - Aquatic Plant Central

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Old 07-19-2019, 04:33 AM   #1 (permalink)
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Default Uv sterilizers and chelated iron precipitation problem

Hello everyone !

Question can anyone tell me if theirs a chelated iron that can withstand UV sterilizer and not precipitate in aquarium water when dosing it.

At first i was using chelated iron DPTA 11% then found out that this was good for P.H 7 and up and im running a discus tank and my P.H is at 6.5 so i changed it to chealted iron EDTA 13%.

Not sure if the EDTA 13% will have a better bond and if the UV light will have a harder time to precipitate the iron. I got some EDTA 13% coming in a few days so time will tell all.

Every time water get fogy when i dose the iron with UV sterilizer on.

Tank parameters are as follows.

Aquarium has bin up and running for a year.

150 gallon tank with 18 watt coralife turbo twist Uv sterilizer.

Ammonia 0
Nitrites 0
Nitrates 10 ppm
K.H 4 ppm
G.H 4 ppm
P.H 6.5
Phosphate 1.5 ppm
Chelated iron 0.5 ppm
Temperature is 86.5 f

Plants doing ok but its just the problem when i dose the iron water gets fogy. So if anyone knows of a better chealted iron source that can withstand the UV sterilizer just drop me some info on it please.

Thanks everyone.
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Old 07-19-2019, 12:48 PM   #2 (permalink)
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Default Re: Uv sterilizers and chelated iron precipitation problem

Diana Walstad, in her book, "The Ecology of the Planted Aquarium", says that intense UV or near UV light causes the iron in the water which is usually not bioavailable, to become bioavailable for a brief time, and might cause algae to grow much better. Algae has to get the iron it needs from the water, since it has no access to the substrate. Thus, this could make life easier for algae. I'm not sure how this relates to the UV breaking down chelators, if it even does. I'm thinking about trying to test this idea sometime in the next 6 months.

Last edited by hoppycalif; 07-20-2019 at 07:55 AM.. Reason: correct error
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Old 07-19-2019, 03:17 PM   #3 (permalink)
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Default Re: Uv sterilizers and chelated iron precipitation problem

Quote:
Originally Posted by hoppycalif View Post
Diana Walstad, in her book, "The Ecology of the Planted Tank", says that intense UV or near UV light causes the iron in the water which is usually not bioavailable, to become bioavailable for a brief time, and might cause algae to grow much better. Algae has to get the iron it needs from the water, since it has no access to the substrate. Thus, this could make life easier for algae. I'm not sure how this relates to the UV breaking down chelators, if it even does. I'm thinking about trying to test this idea sometime in the next 6 months.
Ok thanks hoppy for the info i will check for the write up from Diana walstad The Ecology of the Planted Tank. I will see if the EDTA chelated iron works better with the uv light and repost.
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